body {
  max-width: 10rem;
  margin: 0 auto;
  padding: 0;
}

/* 重置样式 */
*,
*:before,
*:after {
  box-sizing: border-box;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
  margin: 0;
  padding: 0;
}

ul {
  list-style: none;
  padding: 0;
  margin: 0;
  /* margin:0; */
}

.lf {
  float: left;
}

.rf {
  float: right;
}

.hidden-font {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}